Patents by Inventor Guangkai YUAN
Guangkai YUAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230195260Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. In a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M-N|?Q. In a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K-L|?Q and M+K?P. Q denotes a number of detection electrodes which makes an active pen not cause moire after the cancelling, and P denotes a number of detection electrodes not greater than a number of detection electrodes on a touch control screen.Type: ApplicationFiled: February 15, 2023Publication date: June 22, 2023Inventors: Guangkai YUAN, Guanliang LIAO, Xianghua LI
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Patent number: 11620018Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. The method comprises, in a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M?N|?Q. The method further comprises, in a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K?L|?Q and M+K?P.Type: GrantFiled: October 2, 2021Date of Patent: April 4, 2023Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Guanliang Liao, Xianghua Li
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Patent number: 11435855Abstract: A capacitance detection circuit, a touch control chip and an electronic device are provided, which could reduce the influence of a display screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit, connected to a detection capacitance in a touch screen, and configured to amplify a capacitance signal of the detection capacitance and convert the capacitance signal into a voltage signal, the voltage signal configured to determine the detection capacitance; and a control circuit, connected to the amplification circuit, and configured to control a magnification of the amplification circuit, where a period in which a noise peak of a noise signal of a display screen is located includes consecutive N sub-periods, and a magnification of the amplification circuit in the N sub-periods is inversely proportional to a magnitude of the noise signal in the N sub-periods, N>1.Type: GrantFiled: September 16, 2021Date of Patent: September 6, 2022Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Hong Jiang
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Patent number: 11326907Abstract: A circuit and method for capacitance detection, a touch chip, and an electronic device are provided. The circuit includes a control module, a driving module, an offsetting module, and a charge transfer module, the driving module being configured to positively charge a capacitor to be detected through a first charging branch circuit, or negatively charge the capacitor to be detected through a second charging branch circuit under the control of the control module; the offsetting module being configured to offset base capacitance of the capacitor to be detected through a first offsetting branch circuit under the control of the control module, or offset the base capacitance of the capacitor to be detected through a second offsetting branch circuit under the control of the control module; the charge transfer module being configured to transfer a charge on the capacitor to be detected to generate an output voltage.Type: GrantFiled: September 1, 2020Date of Patent: May 10, 2022Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Hong Jiang, Zhi Tang, Haiming Shen
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Patent number: 11301093Abstract: Some embodiments of the present disclosure provide a positive and negative voltage driving circuit. The positive and negative voltage driving circuit includes: a positive and negative voltage generating module and a control module. The positive and negative voltage generating module includes a switch module. The control module is configured to control a turn-off state and a turn-on state of the switch module to enable the positive and negative voltage generating module to output a positive voltage and a negative voltage to a stylus tip of an active stylus. The positive and negative voltage driving circuit of the embodiments of the present disclosure can significantly reduce the driving power consumption of the active stylus while ensuring driving effects.Type: GrantFiled: September 30, 2020Date of Patent: April 12, 2022Assignee: Shenzhen Goodix Technology Co., Ltd.Inventors: Guangkai Yuan, Zhi Tang, Haiming Shen
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Publication number: 20220083194Abstract: A capacitance detection circuit, a touch control chip and an electronic device are provided, which could reduce the influence of a display screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit, connected to a detection capacitance in a touch screen, and configured to amplify a capacitance signal of the detection capacitance and convert the capacitance signal into a voltage signal, the voltage signal configured to determine the detection capacitance; and a control circuit, connected to the amplification circuit, and configured to control a magnification of the amplification circuit, where a period in which a noise peak of a noise signal of a display screen is located includes consecutive N sub-periods, and a magnification of the amplification circuit in the N sub-periods is inversely proportional to a magnitude of the noise signal in the N sub-periods, N>1.Type: ApplicationFiled: September 16, 2021Publication date: March 17, 2022Inventors: Guangkai YUAN, Hong JIANG
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Patent number: 11275428Abstract: The present application provides a capacitance detection circuit, which could reduce the influence of screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit connected to the capacitor to be detected, and configured to convert a capacitance signal of the capacitor to be detected into a voltage signal, the voltage signal being associated with the capacitance of the capacitor to be detected; and a control circuit connected to the amplification circuit, and configured to control an amplification factor of the amplification circuit to be a first amplification factor in a first period, and to control the amplification factor of the amplification circuit to be a second amplification factor in a second period, where noise generated by the screen in the first period is less than noise generated by the screen in the second period, and the first amplification factor is greater than the second amplification factor.Type: GrantFiled: December 15, 2020Date of Patent: March 15, 2022Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Guopao Li, Zhi Yao, Guanliang Liao
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Patent number: 11275468Abstract: This application provides a capacitance detection circuit, which is configured to detect a capacitance between a sensing electrode in a screen and a first driving electrode to which a driving signal is input. The capacitance detection circuit includes: an amplification circuit, connected to the sensing electrode and configured to convert a capacitance signal between the sensing electrode and the first driving electrode into a voltage signal; a cancellation circuit, connected to the amplification circuit and configured to output a cancellation signal to the amplification circuit, where the cancellation signal is used to cancel a noise signal from the screen included in the voltage signal; and a control circuit, connected to a second driving electrode, in the screen, to which no driving signal is input, and configured to generate a control signal, where the control signal is configured to control the cancellation circuit to generate the cancellation signal.Type: GrantFiled: December 15, 2020Date of Patent: March 15, 2022Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventor: Guangkai Yuan
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Publication number: 20220027010Abstract: A signal driving method is provided. One signal driving cycle includes two signal driving periods in which drive signals are applied to P detection electrodes. The method comprises, in a first period, applying non-inverting and inverting drive signals respectively to M adjacent detection electrodes and N adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the M and N electrodes cancel each other out, M+N?P and |M?N|?Q. The method further comprises, in a second period, applying the non-inverting and inverting drive signals respectively to K adjacent detection electrodes and L adjacent detection electrodes. The non-inverting and inverting drive signals respectively applied to the K and L electrodes cancel each other out, K+L?P, |K?L|?Q and M+K?P.Type: ApplicationFiled: October 2, 2021Publication date: January 27, 2022Inventors: Guangkai YUAN, Guanliang LIAO, Xianghua LI
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Patent number: 11093073Abstract: A touch control chip, a touch detection method, a touch detection system and an electronic device, and the touch chip includes: a synchronization module, a touch drive module, and a touch detection module. The synchronization module is electrically connected to a display drive chip, to enable touch driving performed by the touch drive module to have an association relationship with a display control signal of the display drive chip; the synchronization module is electrically connected to the touch drive module, to enable the touch drive module to drive a touch sensor under control of the display control signal; and the touch detection module is electrically connected to the touch sensor, to detect an output signal of the touch sensor to determine a touch position. The touch detection system cancels or reduces interference from a display system, thereby improving the signal-to-noise ratio of the touch detection system.Type: GrantFiled: March 18, 2020Date of Patent: August 17, 2021Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Hong Jiang
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Patent number: 11086446Abstract: The present disclosure relates to touch technology, and provides a touch detection method, a touch chip, and an electronic device. The touch detection method includes applying a driving signal to a driving channel of a touch screen, where the driving signal is encoded based on a preset encoding mode and includes a plurality of signal waveforms divided into waveforms in at least one correlated double sampling cycle. The same correlated double sampling cycle includes two sampling cycles and there is a phase difference of 180° between a waveform in one sampling cycle and that in the other sampling cycle. The touch detection method further includes receiving a sensing signal that corresponds to the driving signal and that is from a sensing channel of the touch screen; and determining a touch position information according to the sensing signal and according to an encoding information corresponding to the encoding mode.Type: GrantFiled: May 4, 2020Date of Patent: August 10, 2021Assignee: Shenzhen Goodix Technology Co., Ltd.Inventors: Hong Jiang, Guangkai Yuan
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Publication number: 20210200296Abstract: The present application provides a capacitance detection circuit, which could reduce the influence of screen noise on capacitance detection. The capacitance detection circuit includes: an amplification circuit connected to the capacitor to be detected, and configured to convert a capacitance signal of the capacitor to be detected into a voltage signal, the voltage signal being associated with the capacitance of the capacitor to be detected; and a control circuit connected to the amplification circuit, and configured to control an amplification factor of the amplification circuit to be a first amplification factor in a first period, and to control the amplification factor of the amplification circuit to be a second amplification factor in a second period, where noise generated by the screen in the first period is less than noise generated by the screen in the second period, and the first amplification factor is greater than the second amplification factor.Type: ApplicationFiled: December 15, 2020Publication date: July 1, 2021Inventors: Guangkai YUAN, Guopao LI, Zhi YAO, Guanliang LIAO
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Publication number: 20210200374Abstract: This application provides a capacitance detection circuit, which is configured to detect a capacitance between a sensing electrode in a screen and a first driving electrode to which a driving signal is input. The capacitance detection circuit includes: an amplification circuit, connected to the sensing electrode and configured to convert a capacitance signal between the sensing electrode and the first driving electrode into a voltage signal; a cancellation circuit, connected to the amplification circuit and configured to output a cancellation signal to the amplification circuit, where the cancellation signal is used to cancel a noise signal from the screen included in the voltage signal; and a control circuit, connected to a second driving electrode, in the screen, to which no driving signal is input, and configured to generate a control signal, where the control signal is configured to control the cancellation circuit to generate the cancellation signal.Type: ApplicationFiled: December 15, 2020Publication date: July 1, 2021Inventor: Guangkai YUAN
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Publication number: 20210041984Abstract: Some embodiments of the present disclosure provide a positive and negative voltage driving circuit. The positive and negative voltage driving circuit includes: a positive and negative voltage generating module and a control module. The positive and negative voltage generating module includes a switch module. The control module is configured to control a turn-off state and a turn-on state of the switch module to enable the positive and negative voltage generating module to output a positive voltage and a negative voltage to a stylus tip of an active stylus. The positive and negative voltage driving circuit of the embodiments of the present disclosure can significantly reduce the driving power consumption of the active stylus while ensuring driving effects.Type: ApplicationFiled: September 30, 2020Publication date: February 11, 2021Inventors: Guangkai YUAN, Zhi TANG, Haiming SHEN
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Publication number: 20210033426Abstract: A circuit and method for capacitance detection, a touch chip, and an electronic device are provided. The circuit includes a control module, a driving module, an offsetting module, and a charge transfer module, the driving module being configured to positively charge a capacitor to be detected through a first charging branch circuit, or negatively charge the capacitor to be detected through a second charging branch circuit under the control of the control module; the offsetting module being configured to offset base capacitance of the capacitor to be detected through a first offsetting branch circuit under the control of the control module, or offset the base capacitance of the capacitor to be detected through a second offsetting branch circuit under the control of the control module; the charge transfer module being configured to transfer a charge on the capacitor to be detected to generate an output voltage.Type: ApplicationFiled: September 1, 2020Publication date: February 4, 2021Inventors: Guangkai YUAN, Hong JIANG, Zhi TANG, Haiming SHEN
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Patent number: 10788903Abstract: A signal generating circuit of an active pen (300), an active pen and a signal driving method are disclosed. The signal generating circuit includes a power source unit (310) and a control unit (320), the power source unit (310) is configured to supply a signal driving voltage to the active pen, and the control unit (320) is configured to control alternate generation of a positive voltage and a negative voltage between a pen tip and a pen casing of the active pen in case where the power source unit only generates a single voltage. The signal generating circuit (300), the active pen and the signal driving method can reduce a signal driving power consumption of the active pen while ensuring a signal driving effect.Type: GrantFiled: November 3, 2018Date of Patent: September 29, 2020Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventor: Guangkai Yuan
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Publication number: 20200285368Abstract: A touch control chip, a touch detection method, a touch detection system and an electronic device, and the touch chip includes: a synchronization module, a touch drive module, and a touch detection module. The synchronization module is electrically connected to a display drive chip, to enable touch driving performed by the touch drive module to have an association relationship with a display control signal of the display drive chip; the synchronization module is electrically connected to the touch drive module, to enable the touch drive module to drive a touch sensor under control of the display control signal; and the touch detection module is electrically connected to the touch sensor, to detect an output signal of the touch sensor to determine a touch position. The touch detection system cancels or reduces interference from a display system, thereby improving the signal-to-noise ratio of the touch detection system.Type: ApplicationFiled: March 18, 2020Publication date: September 10, 2020Inventors: Guangkai YUAN, Hong JIANG
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Publication number: 20200264754Abstract: The present disclosure relates to touch technology, and provides a touch detection method, a touch chip, and an electronic device. The touch detection method includes applying a driving signal to a driving channel of a touch screen, where the driving signal is encoded based on a preset encoding mode and includes a plurality of signal waveforms divided into waveforms in at least one correlated double sampling cycle. The same correlated double sampling cycle includes two sampling cycles and there is a phase difference of 180° between a waveform in one sampling cycle and that in the other sampling cycle. The touch detection method further includes receiving a sensing signal that corresponds to the driving signal and that is from a sensing channel of the touch screen; and determining a touch position information according to the sensing signal and according to an encoding information corresponding to the encoding mode.Type: ApplicationFiled: May 4, 2020Publication date: August 20, 2020Inventors: Hong JIANG, Guangkai YUAN
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Patent number: 10698550Abstract: The present disclosure provides a capacitance detection circuit, which includes a front end circuit and a processing circuit; where the front end circuit comprises a first driving circuit, a first cancel circuit and a PGA circuit, the first driving circuit, the first cancel circuit and the PGA circuit are connected to a first end of a detection capacitor, a second end of the detection capacitor is grounded, and the processing circuit is connected to an output end of the front end circuit, and configured to determine a capacitance variation of a capacitance of the detection capacitor with respect to the base capacitance according to a voltage signal output by the front end circuit.Type: GrantFiled: June 11, 2019Date of Patent: June 30, 2020Assignee: SHENZHEN WEITONGBO TECHNOLOGY CO., LTD.Inventors: Guangkai Yuan, Hong Jiang, Guopao Li
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Patent number: 10627959Abstract: The present application provides a differential circuit, which can improve a signal-to-noise ratio of an output signal. The differential circuit includes a front-end circuit and a processing circuit, where the front-end circuit includes a control circuit and a PGA circuit. The control circuit is configured to: control, at a first stage, the power supply to charge the two capacitors and control the two capacitors to discharge to the PGA circuit; and control, at a second stage, the PGA circuit to charge the two capacitors. The PGA circuit is configured to convert capacitance signals of the two capacitors into voltage signals at the first stage and the second stage respectively, and perform a difference operation. The processing circuit is configured to determine, according to the differential signals output by the front-end circuit at the first stage and the second stage, a target differential signal of voltages corresponding to the two capacitors.Type: GrantFiled: January 26, 2019Date of Patent: April 21, 2020Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.Inventors: Hong Jiang, Guangkai Yuan